For installation :
sudo yum install dnstop And now some description:
dnstop is a libpcap application (ala tcpdump) that displays various
tables of DNS traffic on your network.
dnstop supports both IPv4 and IPv6 addresses.
To help find especially undesirable DNS queries, dnstop provides a
number of filters.
dnstop can either read packets from the live capture device, or from a
Couple of days back, I realized there was too much network activity on my